Patents by Inventor Nobuo Naka

Nobuo Naka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Thermoplastic resin compositions
    Patent number: 4745156
    Abstract: A polyvinyl chloride resin composition is disclosed, which contains an .alpha.-methylstyrene/acrylonitrile copolymer in a specified amount. Forming sheet materials made therefrom having high heat distortion resistance as well as a favorable balance of tensile strength and stretching characteristics at elevated temperatures and being suitable for vacuum and pressure forming are also disclosed.
    Type: Grant
    Filed: August 11, 1986
    Date of Patent: May 17, 1988
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masayuki Yoshihara, Nobuo Naka, Masanori Kobayashi